The efficiency of any estimator can be improved by________.
A) increasing the sample size.
B) decreasing the sample size.
C) making the sample representative.
D) changing the sample.

Question

Quizplus · Accepted Answer

Increasing the sample size improves the estimator's efficiency because it leads to a more accurate estimate of the true population parameter. This is because a larger sample size reduces the impact of sampling variability and increases the precision of the estimator. Decreasing the sample size would reduce the amount of information available and could lead to less accurate estimates. Making the sample representative is important, but it does not necessarily improve the efficiency of the estimator. Changing the sample may or may not improve the efficiency, depending on the nature of the changes made.

The Efficiency of Any Estimator Can Be Improved By________